<template>
  <div id="app">
    <router-view />
    <!-- you can add element-ui's tooltip -->
    <el-tooltip placement="top" content="返回顶部">
      <back-to-top :visibility-height="300" />
    </el-tooltip>
  </div>
</template>

<script>
export default {
  name: 'App'
}
</script>
